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Given a tensor with upper indices in special relativity, what do I know of the corresponding tensor with lower indices? Why?
For example, for the antisymmetric tensor [tex]$\varepsilon ^{iklm} $
[/tex], what is [tex]$\varepsilon _{iklm} $
[/tex]?
For example, for the antisymmetric tensor [tex]$\varepsilon ^{iklm} $
[/tex], what is [tex]$\varepsilon _{iklm} $
[/tex]?